Chemistry Exam

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A nonmetal which has a metallic luster is iodine.

false

All nonmetals are very reactive.

false

All the elements in Group 3A are non-metals.

false

Like nonmetals, metalloids are not brittle.

false

Some metals are gases at room temperature.

false

The properties of metals depend mainly on the number and arrangement of neutrons

false

There are fewer nonmetals than there are elements in any other class

false

True or False: A cannot be drawn into a wire, but A is a good conductor of heat and electricity. We can infer that A is a metal.

false

True or False: A is mostly in solid state at room temperature and is a good insulator of heat. We can infer that A is a metal.

false

True or False: A tends to gain electrons and is a good conductor of electricity, so A is a metal.

false

True or False: Elements in period 5 are all metals.

false

Barium, having two valence electrons, belongs to which group?

group 2

One metal-like property of silicon is its ____ while a nonmetal-like property of silicon is its ___

luster; brittleness

What element is in group 2 and period 3 of the periodic table?

magnesium

Metals can be made into sheets. This property of metals is called ____

malleability

Generally, A loses electrons when reacting with nonmetals and gains electrons when reacting with metals. A is a(n)

metalloid

____, a small group of elements that lie between metals and nonmetals on the periodic table.

metalloids

The elements that are on the left side of the periodic table are called ____

metals

___ are elements that can conduct electricity.

metals

___ usually have one to three electrons in their outer shell.

metals

Which of the following is true?

metals are used in electrical cables as they are malleable, ductile and good conductors of electricity

How many valence electrons do metalloids have?

3-6

____ is the most abundant metal in the earth's crust.

Aluminum

In the periodic table, horizontal rows are called groups

False

The periodic table has changed very little since it was originally developed by Mendeleev and Meyer.

False

All the elements in a family have the _____

Same number of valence electrons

Elements within the same group (column) of the periodic table show similar chemical properties.

True

What metalloid is used in glass to help prevent it from breaking or cracking when subjected to rapid changes in temperature?

boron

Nonmetals are generally good conductors of heat and electricity.

false

Some metalloids are liquids at room temperature.

false

Many nonmetals need to gain electrons(s) to fill their other energy level and become stable. These nonmetals are ___

reactive

Which of the following are properties of nonmetals?

relatively low boiling point poor conductors of heat dull and brittle

Which of the following is the longest period in the periodic table?

sixth period

According to the modern periodic law, elemental properties are the periodic function of the atomic numbers.

true

Nonmetals are used as an insulating material around wire cables since they do not conduct electricity.

true

Nonmetals have a wider variation in properties than do metals.

true

The metalloid class is the smallest class of elements

true

True or False: A is a semiconductor and can form ionic or covalent bonds. A is considered a metalloid.

true

True or False: A is glossy, and it's a good conductor of heat. A is most likely a metal.

true

True or False: A is malleable and can conduct heat and electricity. A is a metal.

true

True or False: Because silicon has properties that are neither distinctly metallic nor clearly nonmetallic, it is a metalloid.

true

True or False: Metalloids are semiconductors are often used in electronics because of this property.

true

True or False. There are 11 periods in the periodic table.

False

Antimony belongs to ______ of the periodic table

Group 5a

Examples of metals include

Sodium

The only nonmetal that is a liquid at room temperature is ____

bromine

Which of the following elements is not a metalloid?

carbon

The sixth period of the periodic table begins with ____

cesium

Bromine is sometimes used as a disinfectant in swimming pools instead of what other nonmetal?

chlorine

The element with atomic number 75 belongs to which block?

d

Properties of nonmetals include

dull appearance

Metalloids that can conduct ____ at higher temperatures are called semiconductors.

electricity

Nonmetals are defined as elements that generally cannot conduct ___ and are poor conductors of heat.

electricity

The chemical symbols for the elements having atomic numbers 60 and 61 are ____ and ____ respectively.

nd,pm

The elements in the boron family of the periodic table are known as:

none of the above

A is generally a poor conductor of heat and electricity and has a wide range of chemical properties. A also tends to gain electrons. A is

nonmetal

Metalloids are found on the boundary between metals and ____ on the periodic table and possess properties that are similar to both types of elements.

nonmetals

The fourth period starts with _____

potassium

Which particles in the nuclei of the atoms are used to arrange the elements?

protons

Which of the following represents a property of metals?

shiny

The metalloid that is used to make computer chips is ____

silicon

The individual members of each chemical family have:

similar electron configurations

What nonmetal is used in the process of vulcanization of rubber?

sulfur

Which of the following statements are TRUE about nonmetals?

they can exist as solids, liquids, or gases they have a wide variety of properties, most of which are the opposite of metals.

All metals are good conductors of heat and electricity.

true

Boron is regarded as a semi-metal.

true

In the periodic table, there are 7 rows and 18 columns

true

Like metals, metalloids may be able to conduct heat and electricity, but not as well as metals.

true

Metalloids fall between metals and nonmetals in the periodic table.

true

Metalloids with four valence electrons may act like either metals or nonmetals, depending on the other elements in the reaction.

true

Metals are the largest of the three classes of elements.

true

Metals can conduct electricity.

true

Most of the elements that make up the human body are nonmetals.

true

Nonmetals are located on the right side of the periodic table.

true

True or False: Metals tend to lose electrons and are good conductors of heat and electricity.

true

True or False: Nonmetals tend to gain electrons.

true

True or False: The periodic table elements located in groups 2, 3, and 4 are all metals.

true

lodine cannot conduct electricity.

true

there are seven periods in the periodic table

true

Which element of period 7 is the heaviest element that occurs naturally on the Earth?

uranium


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